Answer Happy

1. (80 pts. Using the data below, develop cumulative percentage distribution for the data and determine (a) average speed, (b) 85th-percentile speed, (c) 15th- percentile speed, and (d) median speed. Car No. Speed (mi/h) Car No. Speed (mi/h) Car No. Speed (mi/h) Speed (mi/h) Car No. 56.0 23 24 25 26 27 28 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 35.1 44.0 45.8 44.3 36.3 54.0 42.1 50.1 51.8 50.8 38.3 44.6 45.2 41.1 55.1 50.2 54.3 45.4 55.2 45.7 54.1 54.0 46.1 54.2 52.3 57.3 46.8 57.8 36.8 55.8 43.3 55.3 39.0 53.7 40.8 54.5 51.6 51.7 50.3 59.8 40.3 55.1 45.0 48.3 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 SO 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 47.8 47.1 34.8 52.4 49.1 37.1 65.0 49.5 52.2 48.4 42.8 49.5 48.6 41.2 48,0 58.0 49.0 41.8 48.3 45.9 44.7 49.5 67 68 69 70 71 72 73 74 75 76 77 78 79 80 G&wm12,小刀形四wnw%叫5% 49.1 49.2 56.4 48.5 45.4 48.6 52.0 49,8 63.4 60.1 48.8 52.1 48.7 61.8 56.6 48.2 62.1 53.3 53.4 82 86 子